Locomotive boiler



Jan. 31, 1933. 5 TURNER I 1,896,058

LOCOMOTIVE BOILER Filed May 2 1930 2 Sheets-Sheet 1 Jan. 31, 1933.

E. A. TURNER LOGOMOTIVE BOILER Filed May 26, 1930 2 Sheets-Sheet 2 IN VEN TOR Patented Jan. 31, 1933 UNITED STATES] PATENT OFFICE EDWIN I ARCHER TURNER, OF NEW YORK, N. Y.,v ASSIGNOR TO THE STANDARD STOKER COMPANY, INCORPORATED, A CORPORATION OF DELAWARE LOCOMOTIVE BOILER Application filed Kay 26,

My invention relates to railway rolling stock and especially to improvements in the construction of the locomotive boiler backhead. y

The general object of the invention is the provision of a novel and improved locomotive boiler backhead construction wherein the design is materially simplified, and a more durable structure is provided, in which the weight is reduced, and the cost of construction and maintenance lowered.

More particularly, it is an object of this invention to provide in a locomotive boiler, a construction in which the front and rear sheets of the boiler backhead are formed as an integral casting.

A further object of the invention consists in forming the boiler backhead and stoker conduit as an integral casting.

A still further object of the invention is the provision of a boiler backhead having deck supports and grate shaker crank brackets cast integrally therewith.

These and other objects and advantages which consist in the novelty of construction will be apparent and fully describedin the following description when read in connection with the accompanying drawings, in which Fig. 1 is a central longitudinal section through the novel backhead construction with parts of the locomotive structure shown conventionally Fig. 2 is an end elevation of the invention when viewed from without the firebox; and

Fig. 3 is an end elevation of the invention, with parts broken away, when viewed from within the boiler firebox.

Heretoforeit has been the practice in the railway industry to form the boiler backhead of two sheets, commonly referred to as the 'firedoor sheet, to which the inside sheets of the boiler are fastened, and the back sheet to which the outside sheets of the boiler and various locomotive accessories are secured.

1930. Serial No. 455,543.

Due to the stresses developed withinthe boller by the intense heat and generation of steam, the inner and outer sheets of the boiler tend to distort and pull away from one another. This condition is more pronounced at the backhead due to the higher range of temperatures within the firebox in this region.

To overcome this serious condition, the inside and outside sheets of the boiler were tied together by means of stay bolts passed through each and fastened securely in a manner which is well known. The use of stay bolts has been found to be objectionable due to high maintenance cost occasioned by frequent inspection and replacement of these boiler staybolts. This not only meant the expenditure of much time and money, but also caused the locomotive to be placed out of service to permit making these repairs.

While the staybolts at the side sheets of the boiler are readily accessible for inspection and replacement, much difliculty is experienced in inspecting and renewing staybolts in the back sheet of the boiler. This is due to the mountnig of numerous locomotive accessories on the back sheet; also, a part of the back sheet is generally located beneath the cab deck and this necessitated the removal of the cab deck in order that access to the staybolts might be gained.

With the modern tendency of railroads to use higher boiler pressures on locomatives to increase their capacities and economies, the extended use of staybolts has greatly increased the maintenance of the locomotive.

My present invention obviates the use of staybolts in the backhead with a degree of safety never before attained and the invention contemplates designing the locomotive backhead whereinthe stoker conduit deck support and grate shaker crank supports are incorporated as an integral part of the backand outer sheets formed as an integral casting, of almost equal importance is the provision of a stoher conduit, grate shaker supports and decle: supports as an integral part of the bacl head structure. Other locomotive accessories may be incorporated as an integral part of the baclzhead and also any or all of the accessories shown may be omitted without departing from the scope of this invention.

Referring to the drawings and particularly to igure 1, a locomotive is provided with a boiler 11 having a firebox 12 and a steam generating chamber 13. The rearmost portion of the boiler 11 is enclosed by a novel baclrhead structure 14 having the usual firing opening 15 formed therein. The baclzwali 16 and the firedoor sheet 17 of the backhead 1 are formed as an integral casting, and are provided with lateral extensions 18 and 19 to which are secured in any suitable manner the roof sheet 20 and crown sheet 21 respectively.

The lower portion of the baclrhead 14 is secured to a foundation ring 22 which is provided with a downwardly extending flange 23. A plate member 24 carried by the locomotive i0 is secured to this downwardly extending flange 23 to provide a support for the boiler 11 in a well known manner.

The cross wall 25 between the backwall 16 and the fi'edoor sheet 17, forms an arcuate roof portion of the firing opening 15. A continuation 26 of the cross wall 25 bounds the remaining p rtion of the firing opening 15. Extending radially from the cross wall 25 of the firing opening 15 and its continuation 26 are web portions 2? which form a firm union between the baclrwall 16 and the firedoor sheet 17. ll eb portions 2'? are perforated as at 28 to reduce weight, provide free circulation of and readily vent to the chamber 13 any swam which nay be formed in the lower portion of h baclihead 1 1.

In communication with the lower portion of the opening 15 is an aperture 29 serving as a discharge opening for a stoher conduit 30 which is pi *erably formed as an integral part of the baclrhead structure 1 1. T he stolrer con 1 it 30 extends rearwardly and dowr ardly oi the backhead 1 1 and terminates its rearward portion beneath the locomotive cab declr 31 in a spherical seat 32 adapted to form a ball and socket connection with a fuel transferring means from the locomotive tender, not shown. The stoker conduit 30 is substantially s pported from the baclrwall is by a web portion 33 formed integral therewith.

Preferabl though not necessarily, the stolrer conduit 30 is circular in cross section and is shown flaring outwardly at its discharge opening 29. Directly beneath the floor portion 3 of the stoher conduit 30 and adjacent the backwall is is a rectangular opening 35 arranged to receive any suitable steam jet. Forwardly of the backwall 16 and at the lower margin of the firing opening 15 is an up right wall 36 to which a fuel distributing member may be secured through the threaded holes 37 in said wall.

Beneath the firing opening 15 and extending laterally from the backwall 16 are the flange portions 38, which are cast as a part of the backhead structure 14, and are utilized to supportthe locomotive cab deck 31. Projections 39 which serve as grate shaker crank supports are also cast integrally with the backhead structure and are preferably located near the lower margin of the backwall 16.

The specific illustrations shown in the drawings and corresponding specific description herein are used for the purpose of disclosure only, but it will be realized that the substance and essence of the invention may be embodied in other forms as well as those shown.

I claim:

1. A locomotive boiler backhead constituted by an integral casting consisting of an outside wall and a shorter inside wall, the two walls being spaced apart and connected by an imperforate angularly disposed wall portion forming the boundary of a firing opening through the backhead, the endportions of the outside and inside walls being flanged or forwardly turned, an integral central vertical rib perforated at intervals extending between the outside and inside walls and also connecting their forwardly turned flanges, similar perforated ribs angularly disposed to the central rib and spaced therefrom extending diagonally outward from the firing opening, and the lower marginal edges of 7 the'outside and inside walls being spaced to provide an opening for the insertion of a foundation ring, all of said perforated ribs at their outer portions extending to the marginal edge of the forwardly extending flange of i the outer wall and terminating short of the similar edge of the flange of the inside wall.

2. A locomotive boiler backhead constituted by an integral casting consisting of an outside wall and a shorter inside wall, the

short of the similar edge of the flange of the ,TI inside wall, a stoker conduit section lntegral- 1y formed at its mouth portion with the backhead proper and communicating with the firing openin formed therein, the conduit section exten ing rearwardly from said backhead and ribs extending between the section and the outer wall, and the upper wall of the conduit section being formed with a. ledge extendin transversely across the firing opening divi ing the same into upper and lower portions, the upper portion being made of suitable size for the manual introduction of fuel therethrough.

In testimony whereof I aflix my signature.

E. ARCHER TURNER. 

